/*!
* \brief IIR filter with float input, float output and double taps
- * \ingroup filter
+ * \ingroup filter_blk
*
* This filter uses the Direct Form I implementation, where
* \p fftaps contains the feed-forward taps, and \p fbtaps the feedback ones.
*
- * \p fftaps and \p fbtaps must have equal numbers of taps
- *
+ *
* The input and output satisfy a difference equation of the form
\f[
- y[n] - \sum_{k=1}^{N} a_k y[n-k] = \sum_{k=0}^{M} b_k x[n-k]
+ y[n] - \sum_{k=1}^{M} a_k y[n-k] = \sum_{k=0}^{N} b_k x[n-k]
\f]
* with the corresponding rational system function